55661606165 has 8 divisors (see below), whose sum is σ = 72866102688. Its totient is φ = 40481168080.

The previous prime is 55661606087. The next prime is 55661606179. The reversal of 55661606165 is 56160616655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55661606165 - 2¹² = 55661602069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506014547 + ... + 506014656.

It is an arithmetic number, because the mean of its divisors is an integer number (9108262836).

Almost surely, 2^55661606165 is an apocalyptic number.

55661606165 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55661606165 is a deficient number, since it is larger than the sum of its proper divisors (17204496523).

55661606165 is a wasteful number, since it uses less digits than its factorization.

55661606165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012029219.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 55661606165 in words is "fifty-five billion, six hundred sixty-one million, six hundred six thousand, one hundred sixty-five".